社長に

to the company president

→ 社長
phrase Rare #27,663
to the company president に marks the company president as the person an action is directed toward, as in speaking or making a request to them.
JA: 辞めたいなら、直接社長に言って。
EN: If you want to quit, tell the company president directly.

彼はもちろん私の事を社長に告げ口するだろう。

Of course, he’ll tell the president on me.

悪いけど辞めたいなら直接社長に言って

Sorry, but if you want to quit, tell the boss directly.

— Departures (2008)

社長にあんなことを言ったからには僕はくびになるのは確実だ。

Now that I’ve said something like that to the president, I’m sure to get fired.

実はデュヴェルノワ社長にお話があって…彼は私の息子です

Actually, I have something to discuss with President Duvernoy... He’s my son.

— オープン・ユア・アイズ (1997)